package com.springboot.service.Impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.springboot.common.BaseContext;
import com.springboot.common.CustomException;
import com.springboot.dao.OrdersMapper;
import com.springboot.pojo.*;
import com.springboot.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
     private  ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService  orderDetailService;
    /**
     * 用户下单
     * @param orders
     * @return
     */
    @Transactional
    @Override
    public void submit(Orders orders) {
       //获取当前用户ID
        Long userId = BaseContext.getUserId();
        //查询当前用户购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper=new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> carlist = shoppingCartService.list(wrapper);
          if (carlist == null|| carlist.size()==0){
              throw new CustomException("购物车为空，请先添加商品到购物车");
          }
        long orderId = IdWorker.getId();//生成订单ID
        AtomicInteger amount = new AtomicInteger(0);
        //计算总金额
        List<OrderDetail> orderDetails = carlist.stream().map((item) ->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
                return orderDetail;
        }
    ).collect(Collectors.toList());
       //查询用户数据
        User user = userService.getById(userId);
          //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null){
            throw new CustomException("地址信息有误，不能下单");
        }

        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        //向订单表中插入数据
        this.save(orders);
        //向订单详情表中插入数据,多条数据
         orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }
}
